57 lines
2.5 KiB
Go
57 lines
2.5 KiB
Go
package features
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import (
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"testing"
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"time"
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)
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func TestBuildLabelsSpikeUsingOnlyEarlierSameTimeWindows(t *testing.T) {
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base := time.Date(2026, 9, 15, 12, 0, 0, 0, time.UTC)
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events := make([]Event, 0)
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// The prior two daily windows have 10 events and one error each.
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for day := 1; day <= 2; day++ {
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for i := 0; i < 10; i++ {
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events = append(events, Event{Timestamp: base.AddDate(0, 0, -day).Add(time.Duration(i) * time.Second), Service: "api", Kind: "span", IsError: i == 0, DurationMS: float64(i)})
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}
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}
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// Current row is non-error telemetry. The following fifteen minutes have
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// five errors out of ten events: 5x the 10% baseline and above the floor.
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for i := 0; i < 10; i++ {
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events = append(events, Event{Timestamp: base.Add(time.Duration(i) * time.Second), Service: "api", Release: "v2", Kind: "span", IsError: false, DurationMS: float64(i)})
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}
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for i := 0; i < 10; i++ {
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events = append(events, Event{Timestamp: base.Add(5 * time.Minute).Add(time.Duration(i) * time.Second), Service: "api", Kind: "log", IsError: i < 5})
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}
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// The source export's explicit exclusive watermark proves that the rest of
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// the future interval was observed even though it was quiet.
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rows := Build(events, Config{Window: 5 * time.Minute, Step: 5 * time.Minute, Future: 15 * time.Minute, ObservedUntil: base.Add(20 * time.Minute), BaselineDays: 2, MinBaselineSamples: 2, SpikeMultiple: 3, MinFutureErrors: 5})
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var row *Row
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for i := range rows {
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if rows[i].WindowStart.Equal(base) && rows[i].Service == "api" && rows[i].Release == "v2" {
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row = &rows[i]
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break
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}
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}
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if row == nil {
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t.Fatal("missing current api/v2 row")
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}
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if !row.LabelKnown || !row.Label {
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t.Fatalf("expected a known positive label, got %+v", *row)
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}
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if row.BaselineErrorRate != .1 || row.FutureErrorRate != .5 || row.FutureErrorCount != 5 {
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t.Fatalf("unexpected label inputs: %+v", *row)
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}
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if row.P50Duration != 4 || row.P95Duration != 8 || row.SpanCount != 10 {
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t.Fatalf("unexpected fixed-width features: %+v", *row)
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}
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}
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func TestBuildWithholdsLabelWithoutCompleteBaseline(t *testing.T) {
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base := time.Date(2026, 9, 15, 12, 0, 0, 0, time.UTC)
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events := []Event{{Timestamp: base, Service: "api", Kind: "log"}, {Timestamp: base.Add(20 * time.Minute), Service: "other", Kind: "log"}}
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rows := Build(events, Config{Window: 5 * time.Minute, Step: 5 * time.Minute, Future: 15 * time.Minute, BaselineDays: 7, MinBaselineSamples: 7})
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if len(rows) == 0 || rows[0].LabelKnown {
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t.Fatalf("short history must not be labelled: %+v", rows)
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}
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}
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